Idk but i've recorded a frost in the summer (nearly quite often but one day in june 2012) so probably.Castlederg records 1c in june very often.http://www.tutiempo.net/en/Climate/CASTLEDERG/06-2009/39040.htmhttp://www.tutiempo.net/en/Climate/CASTLEDERG/06-2011/39040.htmhttp://www.tutiempo.net/en/Climate/CASTLEDERG/06-2012/39040.htmhttp://www.ogimet.com/cgi-bin/gsynres?lang=en&state=United+K&osum=no&fmt=html&ord=REV&ano=2012&mes=06&day=18&hora=18&ndays=1&Send=send